Improvement in paper-bag machines



2 Sheets-Sheet 1.v

O. E. DAVIDSON. Paper Bag Machine.

No. 201,754. Patented March 26, 1878.

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NYPEIEHS. PHDTO-LITHOGRAPHER. WASHINGTON, n c

2 Sheets-Sheet 2,

0. E. DAVIDSON. Paper Bag Machine.

No. 201,754. Patented March-26, 1878.

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ATTORNEYS.

N PEIERS. PHOTO-LITHOGRAFHER. WASHINGTON. D C.

, folding, operate in the order here named.

, responding groove to receive the same.

UNITEDF'STATES PATENT OFFICE.

OTIS E. DAYIDSON, OF OLARKSVILLE, TENNESSEE.

' IMPROVEMENT- IN PAPER-BAG MACHINES.

Specification forming p r of Le t r Patent N 0. 201,754, dated March 26,1875; application me September 28, 1877. l 7

To all whom it may concern: Be it known that I, OTIS E. DAVIDSON, of Glarksville, in the county of Montgomery and State of Tennessee; have invented a new'and useful'lmprovement in Paper-Bag Machines and Paper 'Bags; andI do hereby declare that the following is a full, clear, and exact description of the same. I

The machine comprises pasting, cutting, and bag-delivering apparatus, which The elements of the pasting apparatus are the paste holders'D, the feed -rolls B B, and the plain segments 0 O, the last two being olpeated by a toothed segment on the drivings a t.

The elements of the cutting apparatus are the knife E, spring I, and cam on shaft N.

The elements'of the folding apparatus are weighted skids for temporarily supporting the paper strip A, the former F,th.e side folders I I, corner-folders V, table II, and the means for operating these-t0 wit, the cam on shaft N, the sliding bar R, and rock-shafts S, 0011': nected with said bar.

The bag pressing and delivery apparatus consists of the hinged table H, pressing-rolls Y, and inclined delivery-table Z.

In the accompanying drawing, forming part of this specification, Figure l is a side elevation of the machine, with part of the frame in section. Fig. 2 is an elevation of the opposite side of the machine. Fig. 3 is a plan view. Figs. 4, 5, 6, 7, and 8 are detail views of detached parts. Fig. 9 is a plan view of a blank for a paper bag, the same having notches to facilitate folding along the dotted lines.

I will now proceed to more particularly describe the construction and arrangement of parts. The upper roll B is idle but the lower feed-roll B is fast on the same shaft, L, with paste-appliers or segments 0, and is hence operated by the same means-to wit, the toothed segment M, which is a radial arm of the driving-shaft N, and meshes with a pinion, a, on said shaft L. The roll B has a central circumferential rib, or, and the upper roll B a cor- The function of these is to crease the paper along the middle, in order to make it fold true around succession.

the former, hereinafter described. The seg ments 0 C are so located that they pass through the paste-boxes at each rotation.

The paste-boxes are connected by a tube 1),

cam, 12, (centrally located,) for depressing the.

knife or cutter-E against the stress of a spring, P, which is coiled around the shank or rod 0, carrying said cutter; another oval shaped cam, 61, which acts upon a lever, Q, and thereby raises the former F at suitable intervals of time; and a cam, e, for reciprocating the slotted bar It, by which thehinged sidefolders II are operated. The rotation of said shaft N and its attached'segment and cams therefore causes the feeding, pasting, cutting, and folding devices, and also a part of the delivery devices, tooperate in the desired manner and The side-folders I I are T- shaped, their vertical portions being formed of parallel plates placed near each other. The folders are pivoted .to rock shafts-S, which are suitably connected, by arod, c, with the sliding bar' R, operated, as aforesaid, by the cam c.

The folder I on the rear rockshaft S has hinged triangular corner-folders V, attached by means of shaftsf,,which are encircled .by spiral retracting-springs g, and provided with pinions g, with which the rack-bars h of table H engage, to operate said "cornerfolders V,

when the table falls away from the folders I I.

The front-folders I, Figs. 3 and 7, have each 'an arm or flat angular plate, j, pivoted to their horizontal base portions, and provided with a spring, 9. The arms j are pressed back, when. the folders I I close together, by a stud, 7c, projecting from the rear folders I, the stud in such case acting upon a beveled projection of the arm j.

The table H has raised ribs m, Fig. 1., which crease the corners of the bag bottom when the folders I I press it down upon the table, and thus adapt the bag-corners to fold readily.

The springs or spring-arms W are hinged asish'own; 1 I

like the table, and lie parallel to its side edges,

. When the former D is pressing the paper down, the arms h 'h, Fig. 8, of table H and spring-arms W are in contact with the imperforate portion t of its long slotted shank F; but when the former F rises, the said arms [2/ h enter the slot 0 in the shank F, (dotted hues, Fig. 8,) and thus the table H and springarms W are allowed to drop by their, own gravity; but, owing to the location of the arms h h and the form of the slot 6', (the same having a notch or shoulder,)the table falls somewhat below the spring-arms W, so that the bag is supported and held off the table while sliding down to the finishing and delivery rolls Y,

and thereby pre'vented froin being smeared by the paste adhering to the table.

The main features of the operation are as: follows: The bag is formed from pieces which are cut off from a continuous paper strip A, (dotted lines, Fig. 1.) The strip passes between the rolls B B, being fed by friction with roll B ,and is pasted along the edges by the plain segments 0 C,-which, like the feed-rolls B B,

have an intermittent rotary motion, The segments have a lateral projection, sothat paste is applied to the blank in theform of the letter L, The portion of the strip Awhich has been .thus pasted is forced or carried along over the space under former F, being supported in such position by the pivoted weighted skids f',-and is then pressed up against a stationary bar, E, and out off by the vertically-acting knife E. It is next pressed downward by the fiat vertically-acting former F between the transverse rollers G, the descent of the former -being-caused by the oval-shaped cam d acting on lever Q. I When the lower end of the former 'F has pressed-the paper upon the table H, the

grooved side-folders II are thrown into vertical position, Fig.- 2, and fold and press the sides of the pasted paper around'the former F, and also press the'side flaps down upon the table H. The pivoted arms j supplement the action ofthe side-folders I I in folding the corners of the bag true and pressing them down on the table. The former- F then recedes, the

table H- falls along with spring-arms W, the

corner-folders V next act upon the side fiaps of the bag to foldthem under and then release it, so that it slides on the spring-arms W down to and between the rollers Y, which give it the finishing pressure and deliver it upon the inclined table Z, whence it slides 0E into any suitable receptacle.

It is obvious that friction-rollers might be substituted for the pinions on which the rackba rsjact, and, generally, the detailsof the appar'atus may bechanged or improved without affecting the operation of the main or essential parts of the machine.

I show in Fig. 9 ablank for a bag, which is cut out or notched on the sides at 0, to facilitate the operation of the folders V in folding under the bottom flaps of the .bag, for it is ob vious. that the less the width or the fewer the thicknesses of paper to fold, the easier will the function of the folders be performed.

What I claim isv Y 1. In a paper-bag machine, the cylindrical feed-roll, the segments 0 G, for pasting the edges of the paper strip, the segment M, for intermittently engaging the pinion d, and the rotating shaft N, all combined to operate as shown and described.

2. In a paper-bag machine, the verticallyreciprocating former F, consisting of a flat metal plate, the hinged'vibra-ting folders'I I,

-so constructed as to receive or embrace the former, as described, and the hinged table H, adapted to maintain a horizontal position when the former descends and the said folders act on the blank, all combined as specified.

3. In a paper-bag machine, the hinged sidefolders I I, the flaps V'V, the hinged table H, and toothed arms h, for acting on the pinions fixed on the rock-shafts ff of the flaps,

all combined as shown and described, to operate as specified. 7 1 g 4. In a paper-bag machine, the verticallyactin former,having a slotted shank, It, and the hinged table, having an arm, h, combined and operating substantially as shownand de scribed. I H

5. In a paperv-bag'machine, the spring-arms j, pivoted to the base of the folders I, and the fingers or studs It, projecting from the folders I, all combined and operating as shown and described. I v 6. In a paper-bag machine, the combination .of the vertically-acting former, having the slotted shank F, the hinged table, having arm 70/, racks h, and the corner-folders V, all combined to operate as shown and described.

. -7. In a paper-bag machine, the combination of the hingedspring-arms W and table 'H, having arms h h, with the former F aud the slotted shankF, constructed as shown and described, to operate as specified. I. OTIS E. DAVIDSON. Witnesses:

ALEX. DAVIDSON, A. A. JOHNSON. 

